| #ifndef PROTON_INTERNAL_UNIQUE_PTR_HPP |
| #define PROTON_INTERNAL_UNIQUE_PTR_HPP |
| |
| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| |
| #include "./config.hpp" |
| |
| #include <memory> |
| |
| namespace proton { |
| namespace internal { |
| |
| template <class T> class pn_unique_ptr; |
| template <class T> void swap(pn_unique_ptr<T>& x, pn_unique_ptr<T>& y); |
| |
| /// A simple unique ownership pointer, used as a return value from |
| /// functions that transfer ownership to the caller. |
| /// |
| /// pn_unique_ptr return values should be converted immediately to |
| /// std::unique_ptr if that is available or std::auto_ptr (by calling |
| /// release()) for older C++. You should not use pn_unique_ptr in your |
| /// own code. It is a limited pointer class designed only to work |
| /// around differences between C++11 and C++03. |
| template <class T> class pn_unique_ptr { |
| public: |
| pn_unique_ptr(T* p=0) : ptr_(p) {} |
| #if PN_CPP_HAS_RVALUE_REFERENCES |
| pn_unique_ptr(pn_unique_ptr&& x) : ptr_(0) { std::swap(ptr_, x.ptr_); } |
| #else |
| pn_unique_ptr(const pn_unique_ptr& x) : ptr_() { std::swap(ptr_, const_cast<pn_unique_ptr&>(x).ptr_); } |
| #endif |
| ~pn_unique_ptr() { delete(ptr_); } |
| T& operator*() const { return *ptr_; } |
| T* operator->() const { return ptr_; } |
| T* get() const { return ptr_; } |
| void reset(T* p = 0) { pn_unique_ptr<T> tmp(p); std::swap(ptr_, tmp.ptr_); } |
| T* release() { T *p = ptr_; ptr_ = 0; return p; } |
| #if PN_CPP_HAS_EXPLICIT_CONVERSIONS |
| explicit operator bool() const { return get(); } |
| #endif |
| bool operator !() const { return !get(); } |
| void swap(pn_unique_ptr& x) { std::swap(ptr_, x.ptr_); } |
| |
| #if PN_CPP_HAS_STD_UNIQUE_PTR |
| operator std::unique_ptr<T>() { T *p = ptr_; ptr_ = 0; return std::unique_ptr<T>(p); } |
| #endif |
| |
| private: |
| T* ptr_; |
| }; |
| |
| template <class T> void swap(pn_unique_ptr<T>& x, pn_unique_ptr<T>& y) { x.swap(y); } |
| |
| } // internal |
| } // proton |
| |
| #endif // PROTON_INTERNAL_UNIQUE_PTR_HPP |